关键词: 杀菌剂, 杀菌剂, 毒力测定, 稻瘟病菌, 水稻纹枯病菌

Abstract: In order to overall evaluated sixteen maize varieties’ suitability in local agricultural ecological circumstance, we studied nine corn ear traits and yield of sixteen maize varieties with the grey relational analysis method through field experiment collected ear traits and yield factors data. Finally, we established a varieties assessment model to be used in sixteen maize varieties comprehensive comparison. The results showed that, three biggest grey relation traits were ear diameter and grain rate, row grains and grain rate, per ear grains weight and per ear weight. The grain rate, row grains, 100-seed weight had most correlation degree with yield. Through the varieties assessment model, ‘Xundan29’, ‘Xianyu335’, ‘Jindan55’, ‘Zhengdan958’, ‘Xundan26’ showed the best advantage. The weighted grey correlation degree assessment model was similar with equal weight assessment model. To breed new maize varieties, we first assured screening optimal grain rate, row grains and 100-seed weight, following coordination with residual ear traits in maize yield breeding practice. The grey relation analysis may play as a data statistic method in maize new varieties introduction and cultivation extension praxis, it will also better service in local agricultural production.